21485805

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{661}}^1$

素因数の和:877

約数の個数: 32

約数和(自身を含む): 37749888

約数和(自身を除く): 16264083

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 197, 591, 661, 985, 1983, 2167, 2955, 3305, 6501, 7271, 9915, 10835, 21813, 32505, 36355, 109065, 130217, 390651, 651085, 1432387, 1953255, 4297161, 7161935, 21485805]

約数ペア:

[(1, 21485805), (3, 7161935), (5, 4297161), (11, 1953255), (15, 1432387), (33, 651085), (55, 390651), (165, 130217), (197, 109065), (591, 36355), (661, 32505), (985, 21813), (1983, 10835), (2167, 9915), (2955, 7271), (3305, 6501)]